IBS, bloating & recurring digestive symptoms in children

What we see in clinic

At The Children's Naturopath, we frequently see children experiencing recurring abdominal discomfort, bloating and unpredictable bowel habits — sometimes despite previous investigations finding no obvious cause.

Drawing on over 28 years of clinical experience, we pay particular attention to bowel movement frequency, digestive transit time, dietary patterns, food intolerances, and the relationship between gut health and the nervous system.

One of the first questions we ask parents is: "Does your child pass a bowel movement every day, and do their tummy aches improve afterwards?"

This can provide valuable insight into whether constipation, incomplete bowel emptying or changes in bowel function may be contributing to recurring digestive symptoms.

Recurring abdominal pain in a child should be assessed by their doctor first. Blood in the stool, weight loss, poor growth, fever, vomiting, or pain that wakes a child at night are not features of irritable bowel syndrome and need investigating on their own terms.

When constipation is behind bloating and tummy aches

One pattern we frequently investigate is children who experience ongoing bloating and abdominal discomfort but do not appear obviously constipated.

Some children pass small amounts of stool regularly while larger amounts remain in the bowel. This can contribute to abdominal distension, reduced appetite, excessive wind and recurring tummy aches.

We therefore look beyond how frequently a child uses the toilet, and consider stool size, consistency and whether the bowel appears to be emptying comfortably. Ideally, stools should be soft, formed, sausage-shaped and easy to pass.

Understanding bowel transit time — the corn test

Another observation we sometimes suggest is the corn test — an everyday observation rather than a clinical test, which can give a rough indication of how long food takes to move through a child's digestive tract.

A child eats a small serving of sweetcorn with their evening meal, and parents observe when the corn kernels first appear in their stool.

Corn eaten at dinner and appearing the following day suggests a relatively quick transit time. If several days pass before the corn appears, this may suggest slower movement through the digestive tract.

This is not a diagnostic test and nothing should be decided on it alone, but it can be useful alongside a bowel diary when investigating recurring constipation and bloating.

Could food intolerances be contributing to IBS symptoms?

Food intolerances are another area we explore, particularly when children experience bloating, excessive wind or abdominal discomfort following meals.

We pay particular attention to the quantity and frequency of foods such as dairy and wheat in a child's diet. A child may tolerate a small amount of dairy but experience digestive symptoms when consuming milk, yoghurt and cheese several times throughout the day. Lactose intolerance can contribute to bloating, abdominal pain, wind and loose stools.

We also explore whether particular carbohydrate-rich foods appear to trigger symptoms through increased intestinal fermentation and gas production. Rather than removing numerous foods at once, we focus on identifying patterns between food intake and digestive symptoms.

Dietary trials in children should be short, structured and followed by reintroduction, with support from their doctor or a dietitian where several food groups are involved. A restricted diet carries its own nutritional cost in a growing child.

Gut bacteria and digestive fermentation

The bacteria living in the digestive tract play an important role in breaking down certain carbohydrates and producing substances involved in gut health. During this process, intestinal bacteria also produce gases.

In some children, increased fermentation or sensitivity to intestinal gas may contribute to bloating, excessive wind and abdominal discomfort.

We consider whether symptoms developed following gastroenteritis, antibiotic use or significant dietary changes. These events can sometimes be associated with changes in gut bacteria and bowel function.

The gut–brain connection

Another important consideration is the relationship between the digestive tract and the nervous system. The gut and brain communicate through a complex network of nerves, hormones and chemical messengers.

In children with IBS, this communication can become more sensitive, meaning normal digestive activity may be experienced as uncomfortable or painful.

We sometimes see children whose tummy aches become more noticeable during periods of anxiety, emotional stress or changes in routine.

This does not mean their symptoms are imaginary. The nervous system can influence bowel movement patterns and how strongly digestive sensations are experienced — the pain is real, and so is the mechanism behind it.

What we encourage parents to observe

A food, bowel and symptom diary can provide valuable information when investigating IBS and recurring bloating. We encourage parents to record:

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  How frequently their child passes a bowel movement.

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  Stool consistency, size and appearance.

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  Whether tummy aches improve after passing a stool.

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  The timing of bloating or abdominal discomfort in relation to meals.

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  Foods consumed before symptoms occur.

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  Whether dairy, wheat or other foods appear to influence symptoms.

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  Any excessive wind or abdominal distension.

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  Changes in symptoms following illness or antibiotics.

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  Whether stress, school days or changes in routine affect digestion.

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  Results of the corn test, when used.

These observations can help identify patterns involving bowel function, food intake and the nervous system.

Our clinical focus is on understanding the factors contributing to recurring digestive discomfort, supporting regular bowel movements, and identifying dietary and digestive patterns that may help children feel more comfortable.

References

Clinical insights by Fiona Stock — Paediatric Naturopath & Children's Nutritionist, founder of The Children's Naturopath, with 28 years of clinical experience.